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I built Drop, a review app where an agent publishes a document, page or small app over MCP, people comment on the exact spot, and the agent publishes a revised version. It includes authenticated access, sharing controls and version history.
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An infrastructure intelligence platform built on 8,600 verified Bangladeshi network cell towers to locate emergency callers without GPS, identify shared tower opportunities, analyze highway connectivity, and run in-browser diagnostics.
Project Overview:
The most precious thing we own is our life. While many developed countries have put their name in the absolute pinnacle of tech industry. Developing and under Developing countries suffer a massive issue due to lack in advancements in tech. People, women, kids suffer from natural disasters and Monsoon floods regularly isolate families in districts in Bangladesh such as Sylhet, Sunamganj, and Feni. Most residents in affected rural areas rely on basic feature phones rather than smartphones with active GPS or mobile data. When calling emergency lines, they cannot share a digital map pin. However, their phone diagnostic screen displays their serving base station codes: the Location Area Code and Cell Identifier.
At the same time, mobile network operators frequently duplicate infrastructure by erecting towers within walking distance of each other, incurring redundant land leases and diesel generator costs. Freight and cold-chain logistics fleets also face coverage dropouts along major trade routes because dispatchers lack route-specific carrier performance data.
KUTNI MCC470 addresses these operational problems using a verified dataset of 8,600 physical cell towers across Bangladesh (MCC 470). It does not use simulated points, mock coordinates, or placeholder records. Every calculation runs on confirmed base stations belonging to Grameenphone, Robi, Banglalink, and TeleTalk.
It's not just a sci-fi concept, this platform not only helps in saving someone's life, but also plays a crucial role in Startups. (From a person getting saved from a life threatening disaster to a Real Estate company using this feature to give their customer's a bit of unique service by telling them which SIM cards to avoid or use for that specific home, ultimately earn some money-money in their wallets).
Core Platform Capabilities:
1. Interactive 3D Globe Network Map
It renders all 8,600 verified network cell towers present in Bangladesh on a 3D spherical Earth using MapLibre GL. Includes three conjoined map controls:
1. Real-life Satellite: Toggle photorealistic ArcGIS world imagery tiles.
2. 2D to 3D Globe: Toggle spherical Earth projection.
3. Reload and Reset: Recenter camera directly over Bangladesh.
It provides real-time filtering by operator (Grameenphone, Robi, Banglalink, TeleTalk) and radio generation (4G LTE, 3G UMTS, 2G GSM).
2. Emergency Phone Triangulation
If an emergency caller uses a basic phone during a flood, a rescue volunteer can ask for the tower numbers displayed on their screen (Location Area Code and Cell ID). It matches those codes to the physical mast location and renders an approximate search perimeter and then calculates the three nearest backup towers from alternative carriers within 10 kilometers using the Haversine formula. Ultimately generating a bilingual field dispatch sheet in English and Bengali with compass bearings for boat crews.
3. Tower Sharing and Co-Location Optimizer
By constructing a cell mast requires significant capital, recurring land rent, and diesel generator fuel. It evaluates distances across all 8,600 towers in real time. Later identifies over 1,000 locations where competing carriers built standalone towers within 250 meters of one another and finally computes annual operational savings in Bangladeshi Taka achieved by consolidating onto a shared structure.
4. Highway Transport Corridors
Freight trucks, delivery vans, and emergency vehicles require continuous network reception along trade routes. Kutni inspects a whole bunch of cell tower distribution along primary national arteries: N1 (Dhaka to Chittagong), N2 (Dhaka to Sylhet), N5 (Dhaka to Bogra), and N8 (Dhaka to Khulna via the Padma Bridge). Furthermore it compares 4G LTE high-speed coverage against 2G GSM voice fallback. Finishing off by formulating primary and failover Dual-SIM hardware configurations for vehicle telematics units.
5. Genuine x86 Virtual Machine Sandbox
Kutni integrates a client-side WebAssembly x86 PC emulator running directly in the browser (meaning real life Operating Systems). It boots graphical KolibriOS or lightweight Linux BusyBox for offline diagnostic calculations and field scripts without server dependence.
6. Systems Architecture Dossier and Plain English Guide
Kutni outlines technical specifications, dataset schemas, and architectural credentials. It furthermore provides a step-by-step interactive walkthrough that explains every operational tool clearly.
Design System and Interface:
1. Color Scheme: Deep obsidian foundation (#070c0e), mint phosphor accents (#00d2be), imperial gold highlights (#d4af37), and telecom cyan (#00A8E8).
2. Tactile Surfaces: Glass-morphic panels with metallic borders, high-contrast status readouts, and responsive mobile and desktop viewports.
3. Audio Feedback: Mechanical clicks and tones synthesized using the Web Audio API for tactile operational confirmation.
For those interested in reviewing the project documentation and underlying calculations, the complete repository is available by clicking here.
This folder includes the verified 8600 network tower lists (CSV), the project pipelines/flowcharts, and a detailed PDF containing all mathematical formulas and equations used.
FirstReply — reply first, win the booking
Description
Event venues lose bookings because they reply a day late. By then the client has booked somewhere else. FirstReply answers every inquiry with a priced proposal and a held date in seconds.
The automation
1. An inquiry arrives from the venue page, or staff paste in an email.
2. AI extracts event type, date, guests, budget and requests, each with a confidence level and the exact words it came from.
3. Missing date or guest count? It writes a clarifying reply instead.
4. It matches the smallest free space that fits (or the two nearest free dates when it's booked), prices the right package and holds the date for 5 days.
5. The client gets their own proposal page and books with one tap. The hold becomes a confirmed booking.
6. Unsure details, over-budget totals or Review mode send it to a review queue first. Humans step in only when needed.
7. Views, acceptances and expiring holds update the pipeline and alert the team live. Every step is logged to the second.
The design A full design system first (tokens, type scale, components), built as a clickable prototype, then rebuilt in Base44 from prompts. Client pages are mobile-first; the venue side is desktop-first.
Try it Client side: firstreply.base44.app · Venue side: firstreply.base44.app/dashboard
A Gentle Rhythm
A calm portal for a child sleep consultant and the families she works with
One workspace instead of a pile of spreadsheets for every client.
Parents log sleep with one tap on their phone. The consultant sees the questionnaire, diary, calculations and plan in one place.
Why I built it
Right when the Base44 Challenge started, I got a new client: a child sleep consultant who needed a website.
My first thought was that she needed more than a website. She needed a real workspace.
Her work with each family involved:
An intake questionnaire in Google Forms.
A paper sleep diary that parents fill in, often at 3 a.m. with a baby in their arms.
An Excel spreadsheet with her own formulas, where she manually copies diary entries and calculates wake windows, naps and night sleep.
A new set of files for every new client.
I looked for a ready-made platform for this niche and couldn’t find one that fit her workflow. She needed more than a generic CRM or a parent-facing sleep tracker.
So I built A Gentle Rhythm.
Two connected spaces
01 · The consultant’s workspace
Available on the web and on her phone.
All families appear in one list, with clear statuses: waiting for the family, questionnaire to review, diary in progress.
Each child’s case brings together:
The intake questionnaire.
The sleep diary.
Sleep calculations and averages.
Private consultant notes.
The plan and its versions.
02 · The family’s space
A simple, invite-only space shared by both parents—and a grandparent, if needed.
Parents can add it to their phone’s home screen and open it like an app, without downloading it from the App Store or Google Play.
Each family sees only its own child.
How it works
Step 0 · Create a space for the family
The consultant creates a case with the child’s name, date of birth and programme length: 7, 14 or 28 days.
She sends an invitation link. The parent sets a password and confirms their email with a six-digit code.
Step 1 · Get to know the family
The intake questionnaire has five chapters: General, Sleep, Temperament, Expectations and Consent.
Parents answer one question at a time, using answer chips or their own words. Their progress is saved as they go.
Before submitting, they can review all their answers. The consultant then reads the questionnaire chapter by chapter and either marks it reviewed or returns it for changes.
Step 2 · Log sleep with one tap
Parents tap “Fell asleep” and “Woke up.”
The ring turns blue while the child sleeps and warm while awake. A short follow-up asks what helped the child fall asleep: two taps, or Skip.
Both parents see the same timer live. Accidental taps can be undone, and each entry shows who logged it.
Step 3 · Let the diary do the calculations
The diary builds itself, with one line per day running from 18:00 to 18:00.
Using the consultant’s own Excel formulas, the app calculates:
Wake windows.
Naps.
Night sleep.
The longest sleep stretch.
Total sleep over 24 hours.
Averages include only complete days selected by the consultant.
She can review the Durations table on her computer or phone. If a family has a question, “Preview as family” opens their space so she can see exactly what they see.
When she needs a spreadsheet, she can export a real .xlsx file in one click.
Step 4 · Write the plan beside the diary
The consultant writes the plan alongside the diary: a letter to the family, target wake windows and tasks for the week.
Drafts stay private. When she publishes a new version, the family sees it immediately.
Step 5 · Follow progress day by day
The family keeps logging sleep. The week view brings together nights, wake windows against the plan and “before → now” progress as the programme continues.
What it saves
For the consultant
No copying paper diaries into Excel. No manual wake-window calculations. No separate set of files for every client. No chasing photos of diary pages in messengers.
One workspace for all her families.
For parents
No tables to fill in at night.
One tap. One hand. In the dark.
How I built it
Her real materials came first
I started with the consultant’s Google Form, paper diary and Excel spreadsheet.
I worked through every formula, built a test day and checked the app against her spreadsheet, number by number, until the results matched.
Design before code
Before building the app, I created a design system with:
Night and day themes.
One consistent colour rule: blue means asleep, warm means awake.
The night and dawn sky backgrounds are my own images, created with Midjourney.
Built with Base44 and Claude Code
Base44 built the application: the database, authentication, access rules and screens.
Claude Code was my design partner. It helped write the design system and implementation prompts, analyse the spreadsheets and test the live site in a real browser—checking screens, console errors and calculations.
21 batches of improvements
Credits were limited, so I grouped each round of fixes into one structured batch for Base44.
The first working version took 21 batches.
Privacy
Families join only by invitation.
Database access rules restrict parents to their own family’s records. I tested this with a second account.
The consultant’s private notes and unpublished plan drafts remain visible only to her.
All names and data in the demo are fictional.
Current stage and what’s next
This is the first working version.
The next step is for the consultant to start using it with real clients.
Longer term, A Gentle Rhythm could become a platform for other sleep consultants, each with their own practice and families.
Access for judges
1 · Explore as the consultant
Open https://gentle-rhythm-sleep.base44.app and select “Log in.”
Email: usertestanya@gmail.com
Password: Base4444
Open Marta’s case, which includes nine days of diary data.
Explore:
Questionnaire.
Diary, including the star calendar and daily Durations.
Plan, including versions and Write / Preview.
Private Notes.
Try “Preview as family” to see the parent experience, and “Export → Download for Excel” to download the spreadsheet.
2 · Explore as a parent
For the best experience, use a phone.
Open the same website and select “Log in.”
Email: usertestpavlo@gmail.com
Password: Base4444
In Kris family space:
Tap “Fell asleep.”
Choose what helped, or tap Skip.
Tap “Woke up.”
Explore Diary and Plan.
For an app-like experience, add the site to your home screen:
iPhone: Safari → Share → Add to Home Screen.
Android: Chrome → ⋮ → Add to Home screen.
3 · See both sides together
Keep the consultant’s workspace open on a computer and log sleep from the parent account on a phone.
The new entry appears in the consultant’s workspace.
All demo names and data are fictional. Please do not delete the demo family.
Links
So cool project 🚀🚀 good luck 🤞🏻